Honeywell C300 PCNT02 Control Data Access integer underflow

Summaryinfo

A vulnerability classified as critical was found in Honeywell C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, C200E and Wireless Device Manager. This impacts an unknown function of the component Control Data Access. The manipulation results in integer underflow. This vulnerability is known as CVE-2025-2523. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Honeywell C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, C200E and Wireless Device Manager. It has been classified as critical. Affected is an unknown function of the component Control Data Access. The manipulation with an unknown input leads to a integer underflow vulnerability. CWE is classifying the issue as CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Honeywell Experion PKS and OneWireless WDM contains an Integer Underflow vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which could result in a failure during subtraction allowing remote code execution. Honeywell recommends updating to the most recent version of Honeywell Experion PKS:520.2 TCU9 HF1 and 530.1 TCU3 HF1 and OneWireless: 322.5 and 331.1. The affected Experion PKS products are C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, and C200E. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3. The OneWireless WDM affected versions are 322.1 through 322.4 and 330.1 through 330.3.

This vulnerability is traded as CVE-2025-2523 since 03/19/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/11/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-21063). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Honeywell

Name

• C200E
• C300 PCNT02
• C300 PCNT05
• C300PM
• CN100
• FIM4
• FIM8
• HCA
• UOC
• Wireless Device Manager

License

• commercial

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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